diff --git a/resources/systems/macos/es_systems.xml b/resources/systems/macos/es_systems.xml
index e1326b7bc..df947a524 100644
--- a/resources/systems/macos/es_systems.xml
+++ b/resources/systems/macos/es_systems.xml
@@ -254,7 +254,7 @@
         <name>atomiswave</name>
         <fullname>Sammy Corporation Atomiswave</fullname>
         <path>%ROMPATH%/atomiswave</path>
-        <extension>.bin .BIN .cdi .CDI .cue .CUE .dat .DAT .elf .ELF .gdi .GDI .iso .ISO .lst .LST .m3u .M3U .7z .7Z .zip .ZIP</extension>
+        <extension>.bin .BIN .dat .DAT .elf .ELF .lst .LST .7z .7Z .zip .ZIP</extension>
         <command label="Flycast">%EMULATOR_RETROARCH% -L %CORE_RETROARCH%/flycast_libretro.dylib %ROM%</command>
         <command label="Flycast (Standalone)">%EMULATOR_FLYCAST% %ROM%</command>
         <platform>arcade</platform>
@@ -1078,7 +1078,7 @@
         <name>naomi</name>
         <fullname>Sega NAOMI</fullname>
         <path>%ROMPATH%/naomi</path>
-        <extension>.cdi .CDI .iso .ISO .elf .ELF .bin .BIN .cue .CUE .gdi .GDI .lst .LST .dat .DAT .m3u .M3U .7z .7Z .zip .ZIP</extension>
+        <extension>.bin .BIN .dat .DAT .elf .ELF .lst .LST .7z .7Z .zip .ZIP</extension>
         <command label="Flycast">%EMULATOR_RETROARCH% -L %CORE_RETROARCH%/flycast_libretro.dylib %ROM%</command>
         <command label="Flycast (Standalone)">%EMULATOR_FLYCAST% %ROM%</command>
         <platform>arcade</platform>
@@ -1088,7 +1088,7 @@
         <name>naomi2</name>
         <fullname>Sega NAOMI 2</fullname>
         <path>%ROMPATH%/naomi2</path>
-        <extension>.cdi .CDI .iso .ISO .elf .ELF .bin .BIN .cue .CUE .gdi .GDI .lst .LST .dat .DAT .m3u .M3U .7z .7Z .zip .ZIP</extension>
+        <extension>.bin .BIN .dat .DAT .elf .ELF .lst .LST .7z .7Z .zip .ZIP</extension>
         <command label="Flycast">%EMULATOR_RETROARCH% -L %CORE_RETROARCH%/flycast_libretro.dylib %ROM%</command>
         <command label="Flycast (Standalone)">%EMULATOR_FLYCAST% %ROM%</command>
         <platform>arcade</platform>
@@ -1098,7 +1098,7 @@
         <name>naomigd</name>
         <fullname>Sega NAOMI GD-ROM</fullname>
         <path>%ROMPATH%/naomigd</path>
-        <extension>.cdi .CDI .iso .ISO .elf .ELF .bin .BIN .cue .CUE .gdi .GDI .lst .LST .dat .DAT .m3u .M3U .7z .7Z .zip .ZIP</extension>
+        <extension>.bin .BIN .dat .DAT .elf .ELF .lst .LST .7z .7Z .zip .ZIP</extension>
         <command label="Flycast">%EMULATOR_RETROARCH% -L %CORE_RETROARCH%/flycast_libretro.dylib %ROM%</command>
         <command label="Flycast (Standalone)">%EMULATOR_FLYCAST% %ROM%</command>
         <platform>arcade</platform>
diff --git a/resources/systems/unix/es_systems.xml b/resources/systems/unix/es_systems.xml
index e4cd92911..ba74459fd 100644
--- a/resources/systems/unix/es_systems.xml
+++ b/resources/systems/unix/es_systems.xml
@@ -263,7 +263,7 @@
         <name>atomiswave</name>
         <fullname>Sammy Corporation Atomiswave</fullname>
         <path>%ROMPATH%/atomiswave</path>
-        <extension>.bin .BIN .cdi .CDI .cue .CUE .dat .DAT .elf .ELF .gdi .GDI .iso .ISO .lst .LST .m3u .M3U .7z .7Z .zip .ZIP</extension>
+        <extension>.bin .BIN .dat .DAT .elf .ELF .lst .LST .7z .7Z .zip .ZIP</extension>
         <command label="Flycast">%EMULATOR_RETROARCH% -L %CORE_RETROARCH%/flycast_libretro.so %ROM%</command>
         <command label="Flycast (Standalone)">%EMULATOR_FLYCAST% %ROM%</command>
         <platform>arcade</platform>
@@ -1124,7 +1124,7 @@
         <name>naomi</name>
         <fullname>Sega NAOMI</fullname>
         <path>%ROMPATH%/naomi</path>
-        <extension>.cdi .CDI .iso .ISO .elf .ELF .bin .BIN .cue .CUE .gdi .GDI .lst .LST .dat .DAT .m3u .M3U .7z .7Z .zip .ZIP</extension>
+        <extension>.bin .BIN .dat .DAT .elf .ELF .lst .LST .7z .7Z .zip .ZIP</extension>
         <command label="Flycast">%EMULATOR_RETROARCH% -L %CORE_RETROARCH%/flycast_libretro.so %ROM%</command>
         <command label="Flycast (Standalone)">%EMULATOR_FLYCAST% %ROM%</command>
         <platform>arcade</platform>
@@ -1134,7 +1134,7 @@
         <name>naomi2</name>
         <fullname>Sega NAOMI 2</fullname>
         <path>%ROMPATH%/naomi2</path>
-        <extension>.cdi .CDI .iso .ISO .elf .ELF .bin .BIN .cue .CUE .gdi .GDI .lst .LST .dat .DAT .m3u .M3U .7z .7Z .zip .ZIP</extension>
+        <extension>.bin .BIN .dat .DAT .elf .ELF .lst .LST .7z .7Z .zip .ZIP</extension>
         <command label="Flycast">%EMULATOR_RETROARCH% -L %CORE_RETROARCH%/flycast_libretro.so %ROM%</command>
         <command label="Flycast (Standalone)">%EMULATOR_FLYCAST% %ROM%</command>
         <platform>arcade</platform>
@@ -1144,7 +1144,7 @@
         <name>naomigd</name>
         <fullname>Sega NAOMI GD-ROM</fullname>
         <path>%ROMPATH%/naomigd</path>
-        <extension>.cdi .CDI .iso .ISO .elf .ELF .bin .BIN .cue .CUE .gdi .GDI .lst .LST .dat .DAT .m3u .M3U .7z .7Z .zip .ZIP</extension>
+        <extension>.bin .BIN .dat .DAT .elf .ELF .lst .LST .7z .7Z .zip .ZIP</extension>
         <command label="Flycast">%EMULATOR_RETROARCH% -L %CORE_RETROARCH%/flycast_libretro.so %ROM%</command>
         <command label="Flycast (Standalone)">%EMULATOR_FLYCAST% %ROM%</command>
         <platform>arcade</platform>
diff --git a/resources/systems/windows/es_systems.xml b/resources/systems/windows/es_systems.xml
index 284dce9f3..9c29fd970 100644
--- a/resources/systems/windows/es_systems.xml
+++ b/resources/systems/windows/es_systems.xml
@@ -263,7 +263,7 @@
         <name>atomiswave</name>
         <fullname>Sammy Corporation Atomiswave</fullname>
         <path>%ROMPATH%\atomiswave</path>
-        <extension>.bin .BIN .cdi .CDI .cue .CUE .dat .DAT .elf .ELF .gdi .GDI .iso .ISO .lst .LST .m3u .M3U .7z .7Z .zip .ZIP</extension>
+        <extension>.bin .BIN .dat .DAT .elf .ELF .lst .LST .7z .7Z .zip .ZIP</extension>
         <command label="Flycast">%EMULATOR_RETROARCH% -L %CORE_RETROARCH%\flycast_libretro.dll %ROM%</command>
         <command label="Flycast (Standalone)">%EMULATOR_FLYCAST% %ROM%</command>
         <platform>arcade</platform>
@@ -1120,7 +1120,7 @@
         <name>naomi</name>
         <fullname>Sega NAOMI</fullname>
         <path>%ROMPATH%\naomi</path>
-        <extension>.cdi .CDI .iso .ISO .elf .ELF .bin .BIN .cue .CUE .gdi .GDI .lst .LST .dat .DAT .m3u .M3U .7z .7Z .zip .ZIP</extension>
+        <extension>.bin .BIN .dat .DAT .elf .ELF .lst .LST .7z .7Z .zip .ZIP</extension>
         <command label="Flycast">%EMULATOR_RETROARCH% -L %CORE_RETROARCH%\flycast_libretro.dll %ROM%</command>
         <command label="Flycast (Standalone)">%EMULATOR_FLYCAST% %ROM%</command>
         <platform>arcade</platform>
@@ -1130,7 +1130,7 @@
         <name>naomi2</name>
         <fullname>Sega NAOMI 2</fullname>
         <path>%ROMPATH%\naomi2</path>
-        <extension>.cdi .CDI .iso .ISO .elf .ELF .bin .BIN .cue .CUE .gdi .GDI .lst .LST .dat .DAT .m3u .M3U .7z .7Z .zip .ZIP</extension>
+        <extension>.bin .BIN .dat .DAT .elf .ELF .lst .LST .7z .7Z .zip .ZIP</extension>
         <command label="Flycast">%EMULATOR_RETROARCH% -L %CORE_RETROARCH%\flycast_libretro.dll %ROM%</command>
         <command label="Flycast (Standalone)">%EMULATOR_FLYCAST% %ROM%</command>
         <platform>arcade</platform>
@@ -1140,7 +1140,7 @@
         <name>naomigd</name>
         <fullname>Sega NAOMI GD-ROM</fullname>
         <path>%ROMPATH%\naomigd</path>
-        <extension>.cdi .CDI .iso .ISO .elf .ELF .bin .BIN .cue .CUE .gdi .GDI .lst .LST .dat .DAT .m3u .M3U .7z .7Z .zip .ZIP</extension>
+        <extension>.bin .BIN .dat .DAT .elf .ELF .lst .LST .7z .7Z .zip .ZIP</extension>
         <command label="Flycast">%EMULATOR_RETROARCH% -L %CORE_RETROARCH%\flycast_libretro.dll %ROM%</command>
         <command label="Flycast (Standalone)">%EMULATOR_FLYCAST% %ROM%</command>
         <platform>arcade</platform>